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发明名称
METHOD & APPARATUS FOR SETTING UNDERWATER DRILLING SYSTEM
摘要
申请公布号
GB8806707(D0)
申请公布日期
1988.04.20
申请号
GB19880006707
申请日期
1988.03.21
申请人
DRILEX SYSTEMS INC
发明人
分类号
E21B7/124;E21B7/128;E21B7/20;E21B17/02
主分类号
E21B7/124
代理机构
代理人
主权项
地址
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